jcagle-
Remember that the version of Gimp I put into grafpup is an "unstable" development release. Script-fu is one of the areas they still have to work on. I've encountered many such errors in this version.

This can be avoided by running the official gimp package Barry put together for the unleashed suite. Just don't try it in grafpup as the two versions will conflict.

I've gotten an even newer development release compiled and running but it seems to have many of the same errors when running script-fu. Basically the scripts need updatingand no one's bothered yet. It's still got a lot going for it, especially with changes in the user interface. I may go back to a more stable release if some of these problems persist, however.